There really isnt much difference at all, except for one. Usually the main page of a website is called index. If thats the case, then it's usually a .html extension. I have my entire site stored in a folder(and subfolders) on this computer. The main site has one html file(the index), and the rest are htm. I also have 4 subfolders. 2 of them have entirely htm files and pic's. Another is all pics, and the other folder has its own index.html and some htm's. Other than that, it shouldnt really matter nowadays.

I have always woundered that also. I never actually thought that there was an actual program diffrance between a .html and .htm Maby one is newer and can do more but so far I havn't found a diffrance yet. All the programs that can be run on HTML and also be run on HTM (as far as I can tell). It seam more logical to use HTM because its shorter but I will probably continue using HTML since everone uses it and Im used to typing it. I agree with everyone else, HTM is probably the lazy way to write HTML. A one letter diffance shouldn't matter unless you have to type it in a textbox with <input type="text" maxlength="25"... or something like that. Funny story I was one letter off of having a link on myspace if I would have known this I would have had that last >
Does anyone know the offical reason for this?
Thanks,
Sparkx

Difference between .htm and .html file extension
HTM vs HTML: Whats The Difference ?

Replying to sandeep



Hi Sandeep



Web Brower does not see the file extension instead looking only the content of the file and gives an output according to the code

Functional wise there is no difference but why two extension are there?

1.The Operating systems like DOS and Windows 3.X does not allow to use 4 letters extension. Hence .Htm is used instead .Html

2.In some cases if the server created it's default directory for only supporting the .Html files then .Htm files cannot use on that server



Regards

Tamil





-reply by Tamilarasan